Booster apparatus for systems of electrical distribution.



No. 648,874. Patented May I, I900. L. LYNDON.

BOOSTER APPARATUS FOR SYSTEMS OF ELECTRICAL DISTRIBUTION.

(Application filed Nov. 22, 1899.)

(No Model.)

UNITED STATES PATENT OFFICE.

LAMAR LYNDON, OF NEW YORK, N. Y.

BOOSTER APPARATUS FOR SYSTEMS OF ELECTRICAL DISTRIBUTION.

SPECIFICATION forming part of Letters Patent No. 648,874, dated May 1,1900.

' Application filed November as, 1899- Serial Nut-737,843. ,(No model.)

To all whom it nmy-o'anccrn:

Beitknown that I, LAMARLYNDON,acltizen.

of the United States, residing in the city of New York, borough ofManhattan in the State of New York, have invented certain new and usefulImprovements in Booster Apparatus for Systems of ElectricalDistribution, of which the following is a specification.

This invention relates to booster apparatus for systems of electricaldistribution; and its tions of electrical energy it is necessary toprovideboosting means for enabling charging of the battery to compensatefor the variations in voltageand for the difference between chargingvoltage and discharging voltage of the battery or to boost the voltageof a system for other reasons, and in order that such boosting meansshall respond to the varying conditions of 'electromotive force on theline it is necessary to provide regulating means therefor, whereby theextra voltage supplied by the booster is graduated at each instant tothe requirements of the system. Tothis end I provide means responsive tocurrentconditions in one of the circuits, preferably the boostercircuit, to regulate the speed of the booster, and thus theelectrometiveforce thereby supplied to the circuit.

In the accompanying drawings, Figure 1 is a diagrammatic'view of thesystem of distrlbution embodying my invention. Fig. 2 shows amodification.

Referring to Fig. 1, the dynamo bus-bars are indicated at 1 2 and areconnected as usual to the dynamos, one of which is indicated at 3. Powerbus-bars or conductors 1' 2' are connected to the consumption-circuit 44' and are connected at one side to a dynamo bus-bar either directly orthrough storage batteries, resistance, or other connection, (indicatedby line 9.) The storage battery 5 is connected across the auxiliary orpower busbars or conductors. The booster is included in circuit 8,leading from generator-bus to auxiliary or power bus. It will beunderstood that the usual switches and connections are provided forestablishing or changing the connections of the battery and booster, aswitch, for example, being provided to connect the battery directly withthe consumption-circuit; but as my invention relates to thebooster-regulating means such connecting means are not shown in detail.

- The booster 7 is preferably shunt-wound, having armature 10 andshunt-wound fieldcoil 11. Mechanically connected by shaft, belting, orgearing with the booster-armature 10 is the armature 12 of a motor 13,this motor being also shunt-wound, its armature 12 andshunt'fieldwinding ll being energized by connections or wires 15 15,leading to busbar I 2, as shown in full lines, or, if desired, the motormay be connected to the auxiliary bus-bar, as indicated at 15' in dottedlines. In either case the result would be to drive the motor atapproximately-constant speed, except under conditions as hereinaftermentioned. The shunt-field winding 14 of the motor is so proportionedthat under normal conditions the field excitation of the motor isconsiderably below the point of saturation.

Included in the booster circuit or connection 8 is a winding 17, whichis placed on the motor 13, preferably around one, all, or any convenientnumber of its field-magnets, so to reinforce or aid the shunt-coil inthe excitation of the field thereof. This auxiliary coil is in serieswith the consumption-circuit and reheives the current passing to theconsumption devices, such as motors or lamps, (indicated at 18,) in suchcircuit, and the effect of this auxiliary series coil is to regulate theaction .of the booster as follows: On increase of current in theconsumption-circuit the auxiliary winding 17 increases the fieldmagnetization of motor 13, thus causing the armature thereof to runslower, with the result that the auxiliary or booster electrometiveforce developed by the booster connection 10 is correspondinglydecreased, thus producing directly the desired regulating ef* feet. Incase a shunt-wound booster is used, as shown, the decrease ofelectromotive force developed by the armature also results in acorresponding decrease of current in the fieldcoils, so that theelectromotive force is furthel decreased. The arrangement shown gives,therefore, a double regulating effect, due in part directly to theslowing down of 5 thefie d-winding of the 'boostergwe'ra sepato thespced'ot the motonnndntheretbmrotthe any manneflaqgo the bcestor and inpart to the 're'gulttn docrease of field strength thereot. -It Ls,-owover, clear that the; reiguhttipnlconld still be. aoeom lished,although not so etlqctiyely, it

' mt'ely excited, as by clrcnit'BO, including an oxciter 21, asiudig'mted in dottod tines, wblch oxeher maybq "connectedbynpapglrstcyinding on the booster-armature. 'ln either'cm in the wwirniw .vba

to the current in] I gl'gifi qqlt. 2 the connection 22 ;lea'l1ini; coil17,-ia showttftlfill itditl endx of a reaigst nise '23}? If vljqoetexmiro'uit, theroby-pu'ttingtheFamiliar motor field-coil inahn'n't withlghld;mdhtnnoe, no as to reqci'fetmmthg lgoost'orlimiltgcnrrent which ia,pr6po rti0 n "al to. pupipmy be 1688 tlinn thanmiulmostor-cnrno'nt by sziy dcfiilo d amount. Q Having thus described in?inw'htion',--twhat, 'I'cJahn as uewthernin'; in t 't byLi-ttet aPawn-mar 1. In a-aystfil qf' the combination. than cite-nits of. intoconnected 1mm the lnnmthh'ud'rggulntu! to tha (-hrrentih th control thethe strength OfCtlrtnQ-itl b6 2-. Iu-s sys'temfotfl l qmri" z theeolabinatibu'jxiith a ii'tiply lion circuits ofa'atorng'cgbzytto d nb'doami' connected' therewith, '-|if'|uo't6r=1forj 0 r atin th'o bonstorand u winding ooimct on Mt connectedtherewith,-a'Shnnt-won Fun regulatethe speedo! the motor inversely to the strength of current in theboost/er.

3. In a-syatem of electrical distribution the c'ombingt-Ion 'with supplyand gonaump- 'tlon'circultk 0t aptorago batteryamlsbooaterconnected'therewtth, an electric metal-"toipperatlng the booatey and anauxilia fieldoil 6n the motorin net-tag relationnone'um'ption-cireultfind adapted to regulate the spoed ot .the'- motorinversely to the str'eugthof curl-ant hi. the consumptton clraultz-t1-14.: In a byatezn 'ot'olootr ica hm b ste ("1W motor for' bporatihgthe "boo otei', .haylnggqnconsumption-circa! the oliabiuatiu withau'ppLY and cgnqu'rnpm nana-twi con nected tharewlttnaatd booing:-bqtpgahubtn.

AMARQWNMN.

